Ladder



(No Model.) f

L. K. WARNER.

LADDER.

Patented Mar. 9, 1886.

WITJVEISSES TQ/T @0M UNITED STATES PATENT OFFICE.

IJEONARD K. WARNER, OF CLAREMONT, NEW HAMPSHIRE.

LADDER.

SPECIFICATION forming part of Letters Patent No. 337,640, dated March 9,1886.

Application filed January 14, 1886. Serial No. 188,561. (No model.)

To all whom it may concern.:

Be it known that I, LEONARD K. WARNER, a citizen of the United States ofAmerica, re-

siding at Claremont, in the county of Sullivan and State of NewHampshire, have invented certain new and useful Improvements in Ladders;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make anduse the same, reference being hadto the accompanying drawings, and to letters or figures of ref-v erencemarked thereon, which form a part of this specification.

My invention has reference to ladders; and it consists in the improvedarrangement for securing independent ladder-sections to each other so asto present a continuous ladder; and the said invention will behereinafter more particularly described and set forth.

In the accompanying drawings, forming part of this specication, Figure lis a perspective view of two ladder-sections secured together. Fig. 2 isatransverse sectional view of the adjacent portions of twoladder-sections, and Fig. 3 is a detail perspective view.

A refers to a section of a ladder, upon the rung a of which are pivotedthe lower portions of bars B B, which are normally located adjacent andparallel to the side standards, b b, of the said ladder-section. The endportions of the rung a are reduced or cut away, as represented at d, inorder to provide for a limited inward oblique play of the said bars B B,as represented byl dotted lines in Fig. 2. Each bar B is provided,adjacent to the ends of the standards I), with a verticallyelongatedslot, e, through which passes the topmost rung, ct', of theladder-section.

As will be observed in the several figures, the bars B B are of suchlength that their extremities extend up to tle first rung, c, of thenext section of the ladder. The said bars B B `are each provided aboveits slot c with a lug or projection,f, which is held rigidly in place byrivets or washers g g. The lower portion of each of the standards b b ofthe upper section of the ladder each have a perforation.

h refers to a keybar, which is pivotally hung by straps t' upon the runga, and the said key-bar, with its reduced portions h h, is of such sizeas to occupy the transverse space between the bars B B when they are intruevertical position represented by full lines in Figs. 1 and 2.

By reference to Figs. l and 2 it will be observed that the standards b bof the upper ladder-section rest upon the standards b b of the lowersection, and that the extremities of the bars B B are recessed so as toengage the lower rung, a, of the upper section, while the pins f of saidbars enter the recesses in the standards b b of the upper sections, theparts and connections being rigidly held by the keybar 7i and itsextensions, which are turned down to a position illustrated in fulllines, so as to have a wedged bearing between the bars B B. Now, when itis desired to remove or detach the sections, the key-bar h, with itsextensions, is turned up to a position illustrated in dotted lines, Fig.2, so that the reduced portions h h will permit the bars B B to be movedto the oblique position represented in dotted lines in said ligure, theelongated slots of said bars passing over the said reduced portions.This inward movement of the bars B B results in withdrawing the pins fffrom the perforations in the side bars of the upper section, which canthen be removed.

From the foregoing it will be apparent that the ladder-connectionhercindescribed is comparatively simple, cheap, and durable` that theconnections of the several ladder-sections being the same may be quicklyand promptly effected, and the several sections as readily disconnectedwhen desired.

I claiml. The combination, with two ladder-sections, of two bars pivotedon one of the seetions and provided with projections adjacent to andengaging the other section, and a locking device adapted t0 hold them inan engaged position, substantially as set forth.

2. The combination, with a ladder-section, of two bars, B B, eachpivoted thereon and provided with an elongated slot, e, and pro jectionsf of a key-block, h, having reduced portions, and a second sectionhaving perfo-V rations to engage said projections, substantially as setforth.

In testimony whereof I affix my signature in presence of two witnesses.

LEONARD K. WARNER.

Witnesses:

HORACE G. CAsE, FRANCIS E. DOWLIN.

